I keep getting mixed advice for DRK Tanking

[Lucke]

I would advise against STR. The added dmg is negligible and so is the aggro you'll get. If you stay with VIT, you give your healer breathing room. They can stay in DPS mode much longer and actually do more DPS than a STR tank. A DPS-mode healer blows away the STR tank dmg.

I have never, ever run into aggro problems on a VIT tank, unless the DPS blows everything at the start of the fight before I get mobs gathered and placed, but even STR won't help there.

[Tiqa]

I would advise against STR. The added dmg is negligible and so is the aggro you'll get.

We're talking about DRK in this thread. DRK dmg isn't negligible at all, as darkness negate dmg penalty from grit, we're basically warriors with full time inner beast and high potency combo.
A full str DRK in grit can easily put 650 dps on dummy, over 750 without grit (as an offtank): less than war (because of berserk), but you definitively can't tell it's negligible

I'm not sure if healer in cleric stance can still push higher than that since he would have to heal as well and can't contribute to dmg 100% of the time.

I have never, ever run into aggro problems on a VIT tank

The aggro management argument is false here since we can buff power slash on single target or spam unleash with blood price on on multiple ones. DRK isn't called king of aggro for no reason. A full VIT DRK shouldn't have any issue with that.